Started 1 week of penicillin after weekend of light tooth pain. The cheek & lip became numb when I began the antibiotics.Changed to another antibiotic because the cheek and lip numbness continued After 1 week my dentist performed root canal and the tooth is doing well, but the lip and cheek numbness continues three days after procedure. My antibiotics end today and the office is closed. My question is, do I need more antibiotics? How long does it take for the numbness to go away?